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Finding the Fourth Proportional to 20,885.43, 31,333.02 and 7,034.43

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Solution

The fourth proportional to 20,885.43, 31,333.02 and 7,034.43 is: 10,553.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.43 : 31,333.02 = 7,034.43 : x
  2. Step 2: Convert to fraction form
    20,885.43/31,333.02 = 7,034.43/x
  3. Step 3: Cross multiply
    20,885.43x = 31,333.02 × 7,034.43
  4. Step 4: Simplify right side
    20,885.43x = 220,409,935.88
  5. Step 5: Solve for x
    x = 220,409,935.88/20,885.43
  6. Step 6: Final answer
    x = 10,553.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.